HP StorageWorks 4400 Enterprise Virtual Array user ... - BUSINESS IT
HP StorageWorks 4400 Enterprise Virtual Array user ... - BUSINESS IT
HP StorageWorks 4400 Enterprise Virtual Array user ... - BUSINESS IT
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Setting<br />
Path A - Failover Only<br />
Path B - Failover Only<br />
Path A - Failover/Failback<br />
Path B - Failover/Failback<br />
38<br />
EVA<strong>4400</strong> operation<br />
Point in time<br />
On controller failback<br />
At initial presentation<br />
On dual boot or controller resynch<br />
On controller failover<br />
On controller failback<br />
At initial presentation<br />
On dual boot or controller resynch<br />
On controller failover<br />
On controller failback<br />
At initial presentation<br />
On dual boot or controller resynch<br />
On controller failover<br />
On controller failback<br />
At initial presentation<br />
Behavior<br />
All LUNs remain on the surviving controller.<br />
There is no failback except if a host<br />
moves the LUN using SCSI commands.<br />
The units are brought online to Controller<br />
1.<br />
If cache data for a LUN exists on a particular<br />
controller, the unit will be brought<br />
online there. Otherwise, the units are<br />
brought online to Controller 1.<br />
All LUNs are brought online to the surviving<br />
controller.<br />
All LUNs remain on the surviving controller.<br />
There is no failback except if a host<br />
moves the LUN using SCSI commands.<br />
The units are brought online to Controller<br />
2.<br />
If cache data for a LUN exists on a particular<br />
controller, the unit will be brought<br />
online there. Otherwise, the units are<br />
brought online to Controller 2.<br />
All LUNs are brought online to the surviving<br />
controller.<br />
All LUNs remain on the surviving controller.<br />
There is no failback except if a host<br />
moves the LUN using SCSI commands.<br />
The units are brought online to Controller<br />
1.<br />
If cache data for a LUN exists on a particular<br />
controller, the unit will be brought<br />
online there. Otherwise, the units are<br />
brought online to Controller 1.<br />
All LUNs are brought online to the surviving<br />
controller.<br />
All LUNs remain on the surviving controller.<br />
After controller restoration, the units<br />
that are online to Controller 2 and set to<br />
Path A are brought online to Controller 1.<br />
This is a one-time occurrence. If the host<br />
then moves the LUN using SCSI commands,<br />
the LUN will remain where moved.<br />
The units are brought online to Controller<br />
2.
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